http://digbig.com/4mtnq
ROSIE DIMANNO
"In Ray Bradbury's famous short story, A Sound of Thunder, a time traveller changes the course of evolution by stepping off a designated tourist path and crushing one little butterfly underfoot. Only a touch more prosaically, the meteorologist Edward Lorenz posited, decades ago, that a butterfly flapping its wings in South America could affect the weather in Central Park. Cause and effect — extraordinary what-if possibilities, conjecturing about the known and unknown — are as much the purview of imagination as science."
